Perhaps you have studiously avoided any studies that contradict your own preconceived notions on the subject. As to the efficacy of natural a immunity in relation the Covid19 virus, the legions of dead, and those suffering long Covid is testament to the fact that natural immunity was not sufficient to survive without adverse health consequences.
In the latest study of "if covid is so deadly and dangerous" then why is China who are the true believers when it comes to covid totalitarianism suddenly abandoning their "zero covid policy"? Do you ever get tired of exploiting the dead for your lock down enthusiasm. If covid is so deadly then why have death rates fallen off a cliff along with mask use and isolation protocols? If any of the covid soyence was true and natural immunity was nearly useless then what we are doing now should have hospitals overflowing with sick, people dieing in the parking lot waiting to be treated they should have dead decomposing bodies stacked in alleyways like firewood. If masks were so effective then why did Florida and Texas where there was about 0 mask use have similar infection rates to the covid lock down states like NY, MI, NJ? If covid was so deadly and contagious then why are employers having people go to work sick? It's like we are back to 2018, where if you don't have sick days to use, you get your ass back to work they don't care how sick you are. I guess covid has outlived it's usefulness.